mouth open

So I’m trying to figure out what’s causing this one torch heads mouth to open up like this only when the lights are off. I’ve had this torch for nearly 2 years and it just started happening. Parameters are: Nitrate- 15 Phosphate-.16 Alk-8.9 Cal-440 Mag-1450 Salinity-1.026 Only difference that...

Is anyone else seeing their gobies trying to scare away much bigger fish by inflating their mouth? Please share your pics here, I'm finding these pretty comical. Here is mine scaring away a powder blue tang 5 times his size. And a much deserved cuddle with Mr Shrimp after all the effort:

Hi, I recently ordered a green bubble tip anenome from the divers den. Upon arrival it looks pretty sad. The mouth is wide open with white coming out of it? I am new to saltwater and this is my first anenome! I've had my tank for about 8 months and it has just been fish and live rock...

Hi all! I’m pretty new to the euphyllia scene, but I got my first hammer today! I ordered it off of a trustworthy seller on ebay and it looked ok when it got to me. I floated, dripped, and dipped the coral. It opened up after an hour or so. It looked ok, until I turned my wave pump on. Its...

Hi, I have this melenarus wrasse, that seems to be swimming with its mouth open. I have noticed over the last couple days. The fish still eats fine (as far as I can tell). Any idea what might be causing this? Thanks everyone.

Hey everyone so I have awful news, my mom set up her reef aquarium 2 months ago and jam packed it with corals against my recommendation (I’m in the industry) 3 of them have since died and I’ve done huge water changes to make up for it but since then her sculy has gotten steadily worse but...